1. Institute for Arctic and Alpine Research University of Colorado Boulder Boulder Colorado USA
2. Scripps Institution of Oceanography La Jolla California USA
3. National Center for Atmospheric Research Boulder Colorado USA
4. Geophysical Fluid Dynamics Laboratory National Oceanic and Atmospheric Administration Princeton New Jersey USA
5. Max Planck Institute for Meteorology Hamburg Germany
6. Uni Climate Uni Research and Bjerknes Centre for Climate Research Bergen Norway
7. Meteorological Research Institute Japan Meteorological Agency Tsukuba Japan